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/*!
    \page qt-debian-packages.html
    \brief Instructions How to Use Enterprise Qt Debian Packages
    \title Enterprise Qt Debian Packages

    To use Enterprise Debian packages with Qt, add your enterprise repositories to Advanced
    Packaging Tool (APT). For details, see
    \l{Debian Repository Configuration Format}.

    To use the enterprise repositories, you need to:
    \list
        \li \l{Installing Public GPG Key}{Install a public GPG key} for enterprise repositories
        \li \l{Configuring Authentication}
        {Configure Qt Account based authentication} for enterprise repository
        access
        \li \l{Repository Configuration Example}{Configure repositories}
    \endlist

    \note The Enterprise Qt Debian packages are provided as technology-preview
    packages. For more details and support,
    \l{https://www.qt.io/contact-us}{contact us}.

    \section1 Debian Repository Configuration Format

    To add extra repositories for APT, insert repositories into a file with an
    extension of \e{.list} under the \e{/etc/apt/sources.list.d} directory. For
    each repository, add a new entry in the file. The generic format is as
    follows:

    \badcode
    deb [arch=<arch> signed-by=<path>] <REPO_URL> <DIST> <COMPONENT(s)>
    \endcode

    An example of an enterprise repository entry:

    \badcode
    $ sudo nano /etc/apt/sources.list.d/tqtc.list

        deb [arch=arm64 signed-by=/home/<user>/keyrings/tqtc/qt-company-debian-repo.gpg] https://debian-packages.qt.io/debian/enterprise/qt-6.3.1-arm64 tqtc-focal main
    \endcode

    See \l{Repository information for Qt Releases} for detailed information
    on how you can configure repositories per Qt release and architecture.

    \section1 Installing Public GPG Key

    Install a public GPG (GNU Privacy Guard) key for Enterprise Qt Debian
    repositories as follows:

    \badcode
    $ mkdir -p $HOME/keyrings/tqtc  # pick a suitable location for you!
    $ cd $HOME/keyrings/tqtc
    $ wget https://cdn.qt.io/debian/keys/qt-company-debian-repo.gpg
    \endcode

    \section1 Configuring Authentication

    To access the listed repositories, you need an enterprise Qt Account
    or an evaluation Qt Account.

    \note If your password contains special characters, you may need to escape
    those by using \b'\\' or \b'%40'.

    Configure the Qt Account credentials for your APT package manager as follows:

    \badcode
    $ sudo nano /etc/apt/auth.conf

          machine https://debian-packages.qt.io
          login <Qt Account login name (email)>
          password <Qt Account password>
    \endcode

    \section1 Updating Local Package Cache

    Update the local package cache as follows:

    \badcode
    $ sudo apt-get update
    \endcode

    No errors should originate from the added repository in the output.

    \section1 Full Configuration Example

    The following code snippet demonstrates the whole work flow with
    Enterprise Qt Debian packages:

    \badcode
    # install repository key
    $ mkdir -p $HOME/keyrings/tqtc
    $ cd $HOME/keyrings/tqtc
    $ wget https://cdn.qt.io/debian/keys/qt-company-debian-repo.gpg

    # configure Qt Account based authentication to Qt Debian repositories
    $ sudo nano /etc/apt/auth.conf
      machine https://debian-packages.qt.io
      login <your Qt Account email>
      password <your Qt Account password>

    # add repositories
    $ sudo nano /etc/apt/sources.list.d/tqtc.list
        deb [arch=arm64 signed-by=/home/<user>/keyrings/tqtc/qt-company-debian-repo.gpg]
        https://debian-packages.qt.io/debian/enterprise/qt-6.3.1-arm64 tqtc-focal main

    # update local package cache
    $ sudo apt-get update

    # search and install packages
    $ apt-cache search qt6.3.1
    ....
    ....
    # files are installed under /opt/qt-6.3.1/
    $ sudo apt-get install qt6.3.1-declarative-dev qt6.3.1-declarative-private-dev ...
    \endcode

    See \l{Repository information for Qt Releases} to pick the needed
    repositories into your \e{/etc/apt/sources.list.d/tqtc.list} file.

    \section1 Troubleshooting

    \section2 Difficulties in authentication

    The server may response with the following HTTP error codes:

    \section3 401 Unauthorized

    Wrong credentials. User email and password must be provided in correct format.

    Also, try storing the credentials directly into the repository config:

    \badcode
    deb [...] https://<Qt Account email>:<Qt Account passwd>@https://debian-packages.qt.io/.....
    \endcode

    If your password contains special characters, you may need to escape those
    for APT. Use '\' or '%40' for escaping those characters or try changing your
    Qt Account password.

    \section3 403 Forbidden

    Missing credentials.

    \section3 429 Too Many Requests

    User has sent too much \b{failed} requests (3 requests per minute).

    \section3 500 Internal Server Error

    Contact \l{https://www.qt.io/contact-us}{Qt support}.

    \section2 Difficulties with repository GPG key usage

    An alternative to 'signed-by' usage attribute in the repository config is to
    install the key in the following way, althoug this is not recommended as
    it's deprecated way to install it:

    \badcode
    $ sudo apt-key add qt-company-debian-repo.gpg
    \endcode

    \section1 Repository information for Qt Releases

    Below you find the Qt releases that the Enterprise Qt Debian packages
    support. Pick the needed repositories and add them to your
    \e{/etc/apt/sources.list.d/tqtc.list} as instructed above.

    Also, the following tables list the installation directories on your
    system and the Linux distribution compatible with the packages.

    \note To access the listed repositories, you need an evaluation Qt Account
    or a commercial Qt Account with a Qt for Device Creation license.

    \note The packages may work on other distributions as well but there is no
    guarantee on that.

    \section2 Qt Creator

    \table
    \header
        \li Architecture
        \li Distribution
        \li Installation directory
        \li Package resource list entries for APT
    \row
        \li amd64
        \li focal-fossa (Ubuntu 20.04)
        \li /opt/qt-creator/
        \li deb [arch=amd64 signed-by=<path>] https://debian-packages.qt.io/debian/enterprise/qtcreator-amd64 tqtc-focal main
    \row
        \li arm64
        \li focal-fossa (Ubuntu 20.04)
        \li /opt/qt-creator/
        \li deb [arch=arm64 signed-by=<path>] https://debian-packages.qt.io/debian/enterprise/qtqtcreator-arm64 tqtc-focal main
    \endtable

    \section2 Qt 6.3.2

    \table
    \header
        \li Architecture
        \li Distribution
        \li Installation directory
        \li Package resource list entries for APT
    \row
        \li amd64
        \li focal-fossa (Ubuntu 20.04)
        \li /opt/qt-6.3.2/aarch64-linux-gnu/
        \li deb [arch=amd64 signed-by=<path>] https://debian-packages.qt.io/debian/enterprise/qt-6.3.2-amd64 tqtc-focal main
    \row
        \li arm64
        \li focal-fossa (Ubuntu 20.04)
        \li /opt/qt-6.3.2/x86_64-linux-gnu/
        \li deb [arch=arm64 signed-by=<path>] https://debian-packages.qt.io/debian/enterprise/qt-6.3.2-arm64 tqtc-focal main
    \endtable

    \section2 Qt 6.3.1

    \table
    \header
        \li Architecture
        \li Distribution (build platform)
        \li Installation directory
        \li Package resource list entries for APT
    \row
        \li amd64
        \li focal-fossa (Ubuntu 20.04)
        \li /opt/qt-6.3.1/aarch64-linux-gnu/
        \li deb [arch=amd64 signed-by=<path>] https://debian-packages.qt.io/debian/enterprise/qt-6.3.1-amd64 tqtc-focal main
    \row
        \li arm64
        \li focal-fossa (Ubuntu 20.04)
        \li /opt/qt-6.3.1/x86_64-linux-gnu/
        \li deb [arch=arm64 signed-by=<path>] https://debian-packages.qt.io/debian/enterprise/qt-6.3.1-arm64 tqtc-focal main
    \endtable
*/
